Richard Engel, Middle East bureau chief for NBC News, has defended himself and other journalists covering hostilities in Iraq from complaints by conservative politicians that correspondents are painting a negative picture of conditions there from isolated positions in the so-called Green Zone. Appearing on PBS's Reliable Sources, hosted by the Washington Post's Howard Kurtz, Engel said that it had been "very frustrating all along to be at the receiving end of that criticism, with accusations like we just spend all of our time in the Green Zone." He said that many reporters go outside the protected area with troops or drive around the city without protection. "I know reporters, colleagues of mine, who have received so much criticism ... that they felt they've had something to prove. And so they put themselves in extraordinarily dangerous situations. And I know one reporter who was kidnapped as a result of it."